Everything I insert from the Isogen Supplemental dialog comes in very small. Flow arrows are almost not visible. Is the size of these tags determined by some drawing scale setting? My piping components all come in correctly.

There might be a way to control the scale from the pipe-alt.dat file. Another option would be open the actual DWG blocks (they are located in the support folder) and scale them up.

DIMSCALE will size the supplemental objects.

Is that what everyone does to all the delivered supplemental blocks prior to using them? Seems odd they come in at the right scale out of the box.

DIMSCALE had no effect.

Under the UNITS command, check the insertion scale units AKA command INSUNITS.

I tried using 0, 1 & 2 for INSUNITS, but it has no effect on these blocks. They always come in the same size.